Tips on unscrewing nameplate off a K series lens

edom31 · 03-12-2020, 09:22 PM - **1 Like**

Originally posted by mkgd1

Let us know if you get it off. We are all waiting with baited breath.

Originally posted by Riggomatic

You could try 1-1/2 PVC pipe coupling

Originally posted by paulh

The nameplate unscrewed easily.

Originally posted by Not a Number

Try warming it up

Thank you all who contributed - GOOD NEWS!!!

So, I decided to put the metal cylinder holding the nameplate and 2 front elements into my small tabletop oven at 300F... left it there for about 45 seconds. It got hot. As I was going to try to spanner my way into the nameplate THE SENCOND ELEMENT FELL INTO MY HAND - Yes! This allowed me to get behind the first element and clean the small traces of fungus the lens had.

Now, I still tried to get the nameplate off - still won't budge! Yet, I honetly do not need it to unscrew anymore as my lens is really clean now (save very minor specs in the rim of the front element).

Mind you, I acquired this lens at a fraction of the cost due to the fungus. Having it serviced at home has just paid up big time!

Again, thank you all!

Test shot (I actually cleaned off the fungus with this, nothing major):

**.a.t.** · 03-12-2020, 10:40 PM - **1 Like**

Originally posted by edom31

Thank you all who contributed - GOOD NEWS!!!
. . .

Congrats!

For what this is worth... If you still have your lens apart, and if you still want to get the nameplate off, I'll tell you how I dealt with my own stubborn one.

Just last week I was dealing with a stuck nameplate on an old telephoto lens. I have a proper spanner and I tried heat, alcohol and even MEK. And still it wouldn't budge! As a last resort, I set the lens face down in a shallow dish of isopropyl alcohol and let it soak for a couple hours. After the soak, I applied heat and, finally, I was able to get the nameplate off with the spanner.

Yes, afterward the lens was a wet mess inside the front end. But the alcohol didn't appear to harm the finish on the lens or the coatings on the elements.

I'm not suggesting anyone else try that method, just sayin' what worked for me.

mkgd1 · 03-12-2020, 11:24 PM - **3 Likes**

Congratulations, now you could probably sell the rest of isopropanol on Craigs list for hand sanitizer

edom31 · 03-13-2020, 04:55 AM - **1 Like**

Originally posted by mkgd1

Congratulations, now you could probably sell the rest of isopropanol on Craigs list for hand sanitizer

Unfortunately, I'll probably need it for myself and family

03-12-2020, 10:40 PM - 1 Like	#17
.a.t. Site Supporter Join Date: Mar 2011 Location: yesterday Photos: Gallery Posts: 1,261	proceed with caution Originally posted by edom31 Thank you all who contributed - GOOD NEWS!!! . . . Congrats! For what this is worth... If you still have your lens apart, and if you still want to get the nameplate off, I'll tell you how I dealt with my own stubborn one. Just last week I was dealing with a stuck nameplate on an old telephoto lens. I have a proper spanner and I tried heat, alcohol and even MEK. And still it wouldn't budge! As a last resort, I set the lens face down in a shallow dish of isopropyl alcohol and let it soak for a couple hours. After the soak, I applied heat and, finally, I was able to get the nameplate off with the spanner. Yes, afterward the lens was a wet mess inside the front end. But the alcohol didn't appear to harm the finish on the lens or the coatings on the elements. I'm not suggesting anyone else try that method, just sayin' what worked for me.

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03-12-2020, 09:22 PM - 1 Like	#16
edom31 Pentaxian Join Date: Nov 2017 Location: Garden City, NY Photos: Gallery Posts: 6,349 Original Poster	Originally posted by mkgd1 Let us know if you get it off. We are all waiting with baited breath. Originally posted by Riggomatic You could try 1-1/2 PVC pipe coupling Originally posted by paulh The nameplate unscrewed easily. Originally posted by Not a Number Try warming it up Thank you all who contributed - GOOD NEWS!!! So, I decided to put the metal cylinder holding the nameplate and 2 front elements into my small tabletop oven at 300F... left it there for about 45 seconds. It got hot. As I was going to try to spanner my way into the nameplate THE SENCOND ELEMENT FELL INTO MY HAND - Yes! This allowed me to get behind the first element and clean the small traces of fungus the lens had. Now, I still tried to get the nameplate off - still won't budge! Yet, I honetly do not need it to unscrew anymore as my lens is really clean now (save very minor specs in the rim of the front element). Mind you, I acquired this lens at a fraction of the cost due to the fungus. Having it serviced at home has just paid up big time! Again, thank you all! Test shot (I actually cleaned off the fungus with this, nothing major):

03-12-2020, 11:24 PM - 3 Likes	#18
mkgd1 Pentaxian Join Date: Dec 2019 Location: Mohave county Arizona Photos: Albums Posts: 1,076	Congratulations, now you could probably sell the rest of isopropanol on Craigs list for hand sanitizer

03-13-2020, 04:55 AM - 1 Like	#19
edom31 Pentaxian Join Date: Nov 2017 Location: Garden City, NY Photos: Gallery Posts: 6,349 Original Poster	Originally posted by mkgd1 Congratulations, now you could probably sell the rest of isopropanol on Craigs list for hand sanitizer Unfortunately, I'll probably need it for myself and family

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